:root {
  color-scheme: dark;
  --page: #111411;
  --surface: #1b1f1b;
  --surface-raised: #242924;
  --border: #414941;
  --text: #eef2e9;
  --muted: #9fa99e;
  --accent: #e0bc61;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  letter-spacing: 0;
  overscroll-behavior: none;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.pixel-lab {
  display: grid;
  grid-template-rows: auto auto auto;
  align-content: start;
  gap: 12px;
  width: min(1180px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 14px;
}

.lab-header,
.tool-dock {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.lab-header h1 {
  margin: 0;
  font-size: 16px;
  line-height: 1.2;
}

.lab-header p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.lab-status {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-size: 11px;
  text-align: right;
}

.simulation-stage {
  display: grid;
  place-items: center;
  justify-self: center;
  width: min(100%, calc((100vh - 158px) * 16 / 9));
  aspect-ratio: 16 / 9;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0d100d;
}

#pixel-physics-canvas {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  background: #141815;
  image-rendering: pixelated;
  touch-action: none;
  cursor: crosshair;
}

.tool-dock {
  min-height: 58px;
  padding: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.material-tools,
.run-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.material-tools {
  flex: 1 1 620px;
  flex-wrap: wrap;
}

.tool-dock {
  flex-wrap: wrap;
}

.material-button {
  display: grid;
  grid-template-columns: 14px auto;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  padding: 0 9px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
}

.material-button:hover,
.material-button:focus-visible {
  background: var(--surface-raised);
  outline: none;
}

.material-button[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--surface-raised);
}

.material-swatch {
  width: 14px;
  height: 14px;
  border: 1px solid rgba(255, 255, 255, 0.26);
}

.material-label {
  font-size: 11px;
}

.brush-control {
  display: grid;
  grid-template-columns: auto minmax(76px, 120px);
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 11px;
}

.brush-control output {
  color: var(--text);
}

.brush-control input {
  width: 100%;
  accent-color: var(--accent);
}

.run-controls button {
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  background: var(--surface-raised);
  cursor: pointer;
}

.run-controls button:hover,
.run-controls button:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.run-controls button:active,
.material-button:active {
  transform: translateY(1px);
}

@media (max-width: 820px) {
  .pixel-lab {
    gap: 8px;
    padding: max(8px, env(safe-area-inset-top)) 8px max(8px, env(safe-area-inset-bottom));
  }

  .lab-status {
    display: grid;
    gap: 2px;
  }

  .simulation-stage {
    width: 100%;
  }

  .tool-dock {
    flex-wrap: wrap;
    align-items: stretch;
  }

  .material-tools {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    width: 100%;
  }

  .material-button {
    min-height: 44px;
    padding: 0 7px;
  }

  .brush-control {
    flex: 1;
  }

  .run-controls button {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 420px) {
  .material-label {
    font-size: 10px;
  }

  .run-controls {
    width: 100%;
    justify-content: flex-end;
  }
}